Timestamp Add/Subtract Calculator |

Timestamp Add/Subtract Calculator

Add or subtract time (days, hours, minutes, seconds) from a Unix timestamp and get the new timestamp and date.

Unix Timestamp:

Operation:

Time Amount:

Days

Hours

Minutes

Seconds

Original Date:

New Timestamp:

New Date:

What is a Timestamp Add/Subtract Calculator?

A timestamp add/subtract calculator is a tool that allows you to perform time arithmetic operations on Unix timestamps. It enables you to calculate a new timestamp by adding or subtracting a specific amount of time (days, hours, minutes, and seconds) from an existing timestamp.

Timestamp add/subtract calculators are useful for:

Scheduling future events based on a reference point
Calculating expiration dates for tokens or sessions
Determining deadlines based on a start time
Planning and projecting date ranges for reports or analytics

How to Add or Subtract Time from a Unix Timestamp

Our timestamp add/subtract calculator helps you easily add or subtract a specific amount of time from a Unix timestamp. This is particularly useful for developers, system administrators, and data analysts who need to perform time arithmetic operations on Unix epoch timestamps.

To use the timestamp add/subtract calculator:

Enter a Unix timestamp in seconds or milliseconds (the calculator automatically detects the format)
Select whether you want to add or subtract time
Enter the amount of time in days, hours, minutes, and seconds
Click "Calculate" to see the new timestamp and corresponding date

Frequently Asked Questions

Why would I need to add or subtract time from a timestamp?

Time arithmetic on timestamps is commonly needed for calculating future or past dates based on a reference point. This is useful for setting expiration times, scheduling events, calculating session timeouts, or determining when a process should start or end based on another timestamp.

How does the calculator handle daylight saving time transitions?

Since Unix timestamps represent seconds since January 1, 1970, UTC, they are unaffected by daylight saving time. The calculation is performed on the raw timestamp values. However, when the resulting timestamp is converted to a readable date, your browser's local time zone settings (including DST rules) will be applied to display the correct local time.

Can I add or subtract negative values?

While our interface is optimized for positive values, you can achieve the same result by switching between the "Add" and "Subtract" operations. For example, adding -5 days is equivalent to subtracting 5 days, and subtracting -3 hours is the same as adding 3 hours.

UnixEpoch